{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T05:20:57Z","timestamp":1788153657795,"version":"build-2803163510"},"reference-count":31,"publisher":"MDPI AG","issue":"17","license":[{"start":{"date-parts":[[2026,8,29]],"date-time":"2026-08-29T00:00:00Z","timestamp":1787961600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cancers"],"abstract":"<jats:p>Background\/Objectives: Evidence regarding associations between local therapy before an indexed systemic regimen and subsequent outcomes in advanced soft tissue sarcoma (STS) remains limited. We evaluated outcomes within four regimen-defined cohorts and explored associations with prior local-therapy history. Methods: This retrospective cohort included 75 patients with recurrent or metastatic STS who contributed 155 treatment episodes: doxorubicin (n = 44), trabectedin (n = 31), pazopanib (n = 42), and eribulin (n = 38). Progression-free survival (PFS) and overall survival (OS) were measured from initiation of the indexed regimen. Surgery, local ablative therapy, and radiation therapy were assessed separately and in combined categories. Post hoc analyses were restricted to leiomyosarcoma. Results: Median PFS was 3.4, 3.1, 5.1, and 3.9 months, respectively. PFS was longer with any local therapy and surgery and\/or ablation in the trabectedin cohort (p = 0.0342 and p = 0.0111) and with surgery and\/or ablation in the eribulin cohort (p = 0.0352). Longer indexed-regimen OS was observed in surgery-containing categories in the doxorubicin and eribulin cohorts. In selected multivariable models, local therapy was associated with OS in doxorubicin- and eribulin-treated episodes and with PFS in eribulin-treated episodes. Leiomyosarcoma-restricted analyses did not consistently reproduce the full-cohort findings. Conclusions: Prior local-therapy history was associated with PFS or OS in selected within-cohort analyses. The associations may reflect local-treatment effects, differences among selected patients, or both; however, the study cannot distinguish these contributions. No between-regimen differences were formally tested. These findings support individualized multidisciplinary assessment and external validation.<\/jats:p>","DOI":"10.3390\/cancers18172806","type":"journal-article","created":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T04:24:03Z","timestamp":1788150243000},"page":"2806","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Association of Prior Local Therapy with Outcomes Within Systemic Therapy Regimen Cohorts in Advanced Soft Tissue Sarcoma: A Retrospective Cohort Study"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4121-2491","authenticated-orcid":false,"given":"Ryotaro","family":"Ohkuma","sequence":"first","affiliation":[{"name":"Department of Oncology, Graduate School of Medicine, Showa Medical University, Tokyo 142-8555, Japan"},{"name":"Showa Medical University Comprehensive Cancer Information Center, Showa Medical University, Tokyo 142-8555, 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Japan"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8645-4112","authenticated-orcid":false,"given":"Masahiro","family":"Shimokawa","sequence":"additional","affiliation":[{"name":"Department of Oncology, Graduate School of Medicine, Showa Medical University, Tokyo 142-8555, Japan"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-7333-7095","authenticated-orcid":false,"given":"Go","family":"Ikeda","sequence":"additional","affiliation":[{"name":"Department of Oncology, Graduate School of Medicine, Showa Medical University, Tokyo 142-8555, 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142-8555, Japan"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6167-8953","authenticated-orcid":false,"given":"Toshiaki","family":"Tsurui","sequence":"additional","affiliation":[{"name":"Department of Oncology, Graduate School of Medicine, Showa Medical University, Tokyo 142-8555, Japan"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"}]},{"given":"Emiko","family":"Mura","sequence":"additional","affiliation":[{"name":"Department of Oncology, Graduate School of Medicine, Showa Medical University, Tokyo 142-8555, 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Medical University, Tokyo 142-8555, Japan"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-8272-5625","authenticated-orcid":false,"given":"Masako","family":"Kato","sequence":"additional","affiliation":[{"name":"Division of Radiation Oncology, Department of Radiology, Graduate School of Medicine, Showa Medical University, Tokyo 142-8555, Japan"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"}]},{"given":"Kanae","family":"Shimada","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Graduate School of Medicine, Showa Medical University, Tokyo 142-8555, 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